Sentences with phrase «in uranium ore»

Radium is a naturally occurring element, most of which is found in uranium ore; it makes up approximately 1 part per trillion of the Earth's crust, making it our planet's 84th most common component.

Fourth, at Oklo, the ratio of 235U to 238U in uranium ore, which should be about 0.72 to 99.27 (or 1 to 138), surprisingly varies a thousandfold over distances as small as 0.0004 inch (0.01 mm)!

In the right picture, a computer programme was used the remove the uraninite to illustrate the large volume hidden in the uranium ore.

The element later turned up in uranium ore deposits, where natural radioactivity can produce traces of plutonium.

Not exact matches

A diversified resources company that operates in several commodity businesses, including aluminum, energy coal and metallurgical coal, iron ore, copper, manganese, uranium, silver and titanium minerals, and has interests in oil, gas, liquefied natural gas and diamonds.

The slag, which typically includes some radioactive uranium and radium in addition to calcium minerals, is the waste product from the conversion of phosphate ore to phosphorus.

Visible from space, the Bayan — Obo iron mine in Inner Mongolia is the world's largest source of rare earths, and the Chinese companies supplying them employ acid to dissolve them out of ore rock that often also contains radioactive elements like thorium, radium or even uranium.

Knowing that uranium and thorium decay into two lead «isotopes» — which can be distinguished by their different physical properties — Soddy later measured the atomic weights of this stable element in ores rich in uranium and thorium, and found that they were 206.08 and 207.69, respectively.

Conventional wisdom has told us that uranium within ore deposits is mostly found in the form of uraninite, a crystalline mineral.

«It would be really nice to identify these organisms and harness this ability to clean up our messes,» says Lee Kerkhof at Rutgers University in New Jersey, who is studying microbes from an old uranium ore mill in Colorado.

Borch, working on an unrelated experiment studying the composition of uranium at mined and unmined sites in Wyoming, surmised that this biogenic (of biological origin), non-crystalline uranium might occur naturally within ore deposits.

In addition, only about one tenth of the mined uranium ore is converted into fuel in the enrichment process (during which the concentration of uranium 235 is increased considerably), so less than a hundredth of the ore's total energy content is used to generate power in today's plantIn addition, only about one tenth of the mined uranium ore is converted into fuel in the enrichment process (during which the concentration of uranium 235 is increased considerably), so less than a hundredth of the ore's total energy content is used to generate power in today's plantin the enrichment process (during which the concentration of uranium 235 is increased considerably), so less than a hundredth of the ore's total energy content is used to generate power in today's plantin today's plants.

The waste liquid in this image is the result of processing raw phosphate with sulphuric acid; it can be both acidic and faintly radioactive due to uranium that is found with phosphate ore.

For ores that contain even less concentrated uranium — McArthur River is the most concentrated active mine — the proportion of waste in radium and other radioactive elements (as well as toxic heavy metals such as arsenic and mercury) is even higher — and McArthur River's uranium is much less concentrated than the mines of the past like nearby Rabbit Lake or Shinkolobwe in the Democratic Republic of the Congo's Katanga Province.

For every metric ton of uranium ore pulled from McArthur River, roughly one metric ton of waste rock, often radioactive and rich in toxic heavy metals, is produced — and other mines produce even more waste rock per ton of ore.

The machines handle the decaying element's radiation better than human miners and can tolerate the radon gas released by the ore; early Navajo miners of uranium in the U.S. — and their families exposed to residual radioactive dust and debris as well as contaminated water — developed lung cancer and other ailments by the 1970s and 1980s.

With the aid of nuclear industry promotional pamphlets and detailed advice he obtained from the Nuclear Regulatory Commission (to which he misrepresented himself as a physics professor), Hahn removed radium from old clocks, extracted americium from smoke detectors, stole tritium from borrowed night - vision equipment, and even ordered a sample of uranium - bearing ore from a company in the Czech Republic.

The oil droplets in the hydrothermal fluids initiated the efficient chemical precipitation of native gold and the formation of very complex - structured gold and uranium ore.»

Uraninite nanoparticles flocculated in the oil and formed uranium ore,» explains Dr. Sebastian Fuchs from the GEOMAR, the first author of the study.

A new field project, led by SLAC researchers and the DOE Office of Legacy Management, is using X-ray techniques to target long - lived groundwater contamination (large dark brown area) at former uranium ore processing sites in the floodplains of the upper Colorado River basin.

Researchers at the Department of Energy's SLAC National Accelerator Laboratory are trying to find out why uranium persists in groundwater at former uranium ore processing sites despite remediation of contaminated surface materials two decades ago.

The report also points out that RTZ's records on radiation doses show that before 1982 individual workers were exposed to more than the permissible doses in the final processing areas, where ore is roasted to recover uranium oxide.

The concentration of U235, expressed by percentage of weight in uranium, in a given quantity of uranium ore, uranium hexafluoride or uranium metal.

The «new RECA» expands the universe of workers eligible for federal compensation to include open - pit uranium miners, uranium millworkers and ore - hauling truck drivers; expands the list of compensatory illnesses and causes of death to include several cancers in addition to lung cancer, certain nonmalignant respiratory diseases, and diseases of the kidney.

Known recoverable uranium resources in unmined ore deposits by country as of 2004 are shown in Table 1.

Russian UET resources with 311,000 tonnes of uranium, as well as the remaining Russia «excess» HEU with 108,000 tonnes of uranium, could continue to offset demand for primary uranium from unmined ore deposits, and could reduce the likelihood that new mines such as those proposed near Church Rock and Crownpoint in New Mexico would be mined in the future.

First, Russia was unable to increase its domestic uranium production to meet its domestic reactor needs as Russia has been unable to increase production from either its primary uranium ore deposits at Krasnokamensk in the Chita Region (see www.sric.org/mining/docs/Chitafin.php), or new deposits.

Experimental support is lacking for the claim that all this happened in a distant stellar explosion billions of years ago and somehow uranium was concentrated in relatively tiny ore bodies on earth.]

U still around, how did it get here, what concentrated it in ore bodies on earth, and why do we not see much more lead associated with the uranium?

In the race for the atomic bomb in the lead up to World War II, the Allies had effectively secured most of the world uranium ore deposits under their poweIn the race for the atomic bomb in the lead up to World War II, the Allies had effectively secured most of the world uranium ore deposits under their powein the lead up to World War II, the Allies had effectively secured most of the world uranium ore deposits under their power.

Which is a good job, given the shortage of high - grade uranium ore, the huge unmanageable risks associated with nuclear plants and nuclear proliferation, the large amounts of embedded carbon in uranium refining and processing (and other GHG emissions from the nuclear industry), and the insanity of developing a huge strategic fuel dependence on countries such as Russia.

Australia's enviable prosperity isn't due to sunshine and breezes, it's down to iron ore, coal and a bevy of other minerals including copper and uranium of the kind being gouged out of the ground by BHP Billiton at Roxby Downs in South Australia's North (see above).

Australia's enviable prosperity isn't due to sunshine and glinting solar panels or windmills flailing in the breeze, it's down to iron ore, coal and a bevy of other minerals including copper and uranium of the kind being gouged out of the ground by BHP Billiton at Roxby Downs in South Australia's North (see above).

In the United States in the late 1950s, for example, uranium ore contained roughly 0.28 percent uranium oxidIn the United States in the late 1950s, for example, uranium ore contained roughly 0.28 percent uranium oxidin the late 1950s, for example, uranium ore contained roughly 0.28 percent uranium oxide.

The amount of uranium ore of high enough grade for use in thermal uranium based reactors is not so plentiful that it would last very long in worldwide use.

It probably makes sense in Austrialia, too, given Australias huge reserve of high quality uranium ore.

You want to have one of the passwords that doesn't get cracked so you don't wake up a few days later to an email receipt because Amazon just billed you for 1,000 tins of uranium ore and shipping to someone in North Korea.